c# - The query results enumerated more than once -

c# - The query results enumerated more than once -

  डेटाकॉन्टेन्टेक्स्ट्रेस डीसी = नया डेटाकॉन्टेन्टेक्स्ट क्लास (); Var समाचार = डीसी। गेट न्यूज़कंपनी (Int64.Parse (_idCompany)); अगर (समाचार.गेटएनेमेटरेटर ()। मूव नेक्स्ट ()) {विदेशी खबर (समाचार में विभिन्न आइटम) {drpListNews.Items.Add (item.Title); }}    वापसी त्रुटि: {"क्वेरी परिणाम एक से अधिक बार की गणना नहीं की जा सकतीं।"}  
 कैसे परिणाम जांच सकता है! = LINQ में = null;  SqlDataReader  खोलने के लिए छोड़ दिया जा सकता है - अच्छा नहीं)। इस मामले में,  बस इसे बताएं  यदि कोई रिकॉर्ड नहीं है, तो यह तुच्छ होगा:  
  अगर (समाचार! = नल) {foreach (समाचार में विभिन्न आइटम) {drpListNews.Items.Add (item.Title); }}    यदि आप दोबारा डेटा  की आवश्यकता  कर रहे हैं, तो उसे एक सूची में रखें:  
  var news = (blah)। सूची बनाने के लिए();








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